@function pr($p){
    @return $p/75+rem;
}
// 调用方法示例:
// .box{
//     width: pr(100);相当于width: 100px;
// }

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html,body{
    height: 100%;
    width: 100%;
}
a{
    text-decoration: none;
}
img{
    display: block;
}
ul,ol{
    list-style: none;
}
.fl{
    float: left;
}
.fr{
    float: right;
}
.clearfix::before, .clearfix::after{
    content:"";
    display:table;
}
.clearfix::after{clear:both;}
.clearfix{*zoom:1;}
